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Hong Kong's Mai Po marsh is an important migratory stopover for more than 100,000 birds per year from Siberia to Australia. Many of the bird species that stop in the marsh are endangered, and there are no other suitable wetlands to replace Mai Po.
Currently the Chinese government is considering building a large housing project at the marsh's boundary, which could adversely affect the birds. Environmentalists estimate that if the project goes through, there will be a 60% chance that the black-faced spoonbill (current world population = 450) will not survive.
It is estimated that there is a 70% chance the Chinese government will go ahead with the building project. What is the probability of the species' survival (assuming no danger if the project doesn't go through)?
The goal is to get people thinking about how they can actually use correlation and regression in their real life, and where and how can they can really benefit from these techniques?
How many hamburgers must the restaurant stock to be 98% sure of not running out on a given day?- Why is the independence assumption in part c probably not realistic?
1. If 8.78 g of CuNO3 is dissolved in water to make a 0.630 M solution, what is the volume of the solution? 2. How many milliliters of 11.5 M HCl(aq) are needed to prepare 520.0 mL of 1.00 M HCl(aq)?
Of the students who scored around 50 on the midterm, about what percentage were in the top 25% of the class on the final?
Coin Flipping - Someone will flip a coin 50 times every day andwill compute the percentage of flips that day that come up heads. You mustguess a range within which you think this percentage will fall and you must usethe same range each day.
The math grades on the final exam varied greatly. Using the scores below, how many scores were within one standard deviation of the mean? How many scores were within two standard deviations of the mean?
fat contents in percentage for 10 randomly selected hot dogs were given in the article sensory and mechanical
Describe when a z-test should be performed as opposed to a t-test? Which (if any) can we use all the time? Why or why not?
A major DVD-of-the-month club collected data on the reasons for returned shipments during a quarter. Results are: Wrong Selection, 50,000; Refused, 195,000; Wrong Address, 68,000; Order Canceled, 5000; and Other, 15,000. Construct a Pareto diagram..
Determine the setting for the mean so that no more than 1% of the cans of paint will be unacceptable.
A manufacturer of batteries for "kids' toys" wishes to investigate the length of time a battery will last. Tests results on a sample of 10 batteries indicated a sample mean of 5.67 and a sample standard deviation of 0.57.
1. for the 16 teams in the national league data is shown for the team batting averages as of august 27 2012.
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